taxodontadj.n.

Brit.

/ˈtaksədɒnt/, U.S.

/ˈtæksəˌdɑnt/

Origin: A borrowing from Greek, combined with an English element; modelled on a Latin lexical item. Etymons: Greek τάξις , -odont comb. form.

Etymology: < ancient Greek τάξις arrangement, order (see taxis n.) + -odont comb. form, after scientific Latin Taxodonta, order name (M. Neumayr 1884, as German Taxodonten, in Sitzungsber. der Kaiserlichen Akad. der Wissensch. 1883: Math.-Naturwissensch. Classe 88 Abt. I. 388).

Zoology and Palaeontology.

A. adj.

Of the shell of a bivalve mollusc: having the hinge formed by a long series of similar teeth and sockets, typified (in some classification schemes) by the order Taxodonta, which contains the ark shells. Also: (of the hinge or dentition) having this form.In most recent schemes the taxon Taxodonta is no longer used. Ark shells are now usually placed in the order Arcoida.

ΘΚΠ

the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Pelecypoda or Conchifera > [adjective] > of bivalve molluscs or shells

cardinal1809

conchyliferous1811

transverse1822

conchiferous1833

transversal1835

tellinoid1841

shell-bearing1844

saxicavous1850

auriculate1854

pelecypodous1857

sinupallial1863

tubivalve1882

sinupalliate1883

pelecypod1890

taxodont1895

1895 Trans. Wagner Free Inst. Sci. (Philadelphia) 3 489 It is obvious that with a shell having elevated beaks distant from the hinge-line, and numerous ribs, many of the latter would intersect the hinge-line nearly at right angles, so as to form a series of denticulations..constituting the prototype of such teeth as were called Taxodont by Neumayr.

1943 J. Gardner Mollusca Miocene & Lower Pliocene Virginia & N. Carolina i. 28/2 Dall..considered the dysodont hinge to be essentially a taxodont hinge modified by umbonal torsion.

1961 J. Stubblefield Davies's Introd. Palaeontol. (ed. 3) ii. 39 The hinge, being set with numerous teeth,..is taxodont.

2000 Jrnl. Paleontol. 74 600/1 The hypothesis of halobioids as cryptodonts is not supported either by ligament features..or by the lack of taxodont dentition.

B. n.

A mollusc with a taxodont shell hinge; spec. a mollusc of the order Taxodonta. Now rare.

ΘΚΠ

the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Pelecypoda or Conchifera > [noun] > bivalves > of particular type > other types

heart1750

sea-clam1765

Mactra1777

terebellum1851

red nose1856

red nose1864

taxodont1896

Pismo clam1911

pectinoid1952

1896 Amer. Geologist 18 130 The taxodonts are much more ancient and Jackson has demonstrated their primitive character from a study of the mode of development in these shells.

1950 Jrnl. Paleontol. 24 89/1 The prionodonts are not closely related to the true taxodonts such as Nucula, Nuculana, and Yoldia.

1969 Amer. Zoologist 9 670/1 All taxodonts belong to the first and fourth groups, and all heterodonts and desmodonts to the fourth group.

This entry has been updated (OED Third Edition, March 2013; most recently modified version published online March 2022).

单词	taxodont
释义	taxodontadj.n. Brit. /ˈtaksədɒnt/, U.S. /ˈtæksəˌdɑnt/ Origin: A borrowing from Greek, combined with an English element; modelled on a Latin lexical item. Etymons: Greek τάξις , -odont comb. form. Etymology: < ancient Greek τάξις arrangement, order (see taxis n.) + -odont comb. form, after scientific Latin Taxodonta, order name (M. Neumayr 1884, as German Taxodonten, in Sitzungsber. der Kaiserlichen Akad. der Wissensch. 1883: Math.-Naturwissensch. Classe 88 Abt. I. 388). Zoology and Palaeontology. A. adj. Of the shell of a bivalve mollusc: having the hinge formed by a long series of similar teeth and sockets, typified (in some classification schemes) by the order Taxodonta, which contains the ark shells. Also: (of the hinge or dentition) having this form.In most recent schemes the taxon Taxodonta is no longer used. Ark shells are now usually placed in the order Arcoida. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Pelecypoda or Conchifera > [adjective] > of bivalve molluscs or shells cardinal1809 conchyliferous1811 transverse1822 conchiferous1833 transversal1835 tellinoid1841 shell-bearing1844 saxicavous1850 auriculate1854 pelecypodous1857 sinupallial1863 tubivalve1882 sinupalliate1883 pelecypod1890 taxodont1895 1895 Trans. Wagner Free Inst. Sci. (Philadelphia) 3 489 It is obvious that with a shell having elevated beaks distant from the hinge-line, and numerous ribs, many of the latter would intersect the hinge-line nearly at right angles, so as to form a series of denticulations..constituting the prototype of such teeth as were called Taxodont by Neumayr. 1943 J. Gardner Mollusca Miocene & Lower Pliocene Virginia & N. Carolina i. 28/2 Dall..considered the dysodont hinge to be essentially a taxodont hinge modified by umbonal torsion. 1961 J. Stubblefield Davies's Introd. Palaeontol. (ed. 3) ii. 39 The hinge, being set with numerous teeth,..is taxodont. 2000 Jrnl. Paleontol. 74 600/1 The hypothesis of halobioids as cryptodonts is not supported either by ligament features..or by the lack of taxodont dentition. B. n. A mollusc with a taxodont shell hinge; spec. a mollusc of the order Taxodonta. Now rare. ΘΚΠ the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > class Pelecypoda or Conchifera > [noun] > bivalves > of particular type > other types heart1750 sea-clam1765 Mactra1777 terebellum1851 red nose1856 red nose1864 taxodont1896 Pismo clam1911 pectinoid1952 1896 Amer. Geologist 18 130 The taxodonts are much more ancient and Jackson has demonstrated their primitive character from a study of the mode of development in these shells. 1950 Jrnl. Paleontol. 24 89/1 The prionodonts are not closely related to the true taxodonts such as Nucula, Nuculana, and Yoldia. 1969 Amer. Zoologist 9 670/1 All taxodonts belong to the first and fourth groups, and all heterodonts and desmodonts to the fourth group. This entry has been updated (OED Third Edition, March 2013; most recently modified version published online March 2022). < adj.n.1895
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